I have disabled the discrete GPU using vgaswitcheroo and I'm using KDE (with OpenGL desktop effects & vsync) as my main desktop.When watching full screen flash videos, there's noticable tearing. Switching to uxa acceleration doesn't make any difference, neither does disabling flash hardware acceleration in /etc/adobe/mms.cfg.

The only thing that seems to help funnily enough, is disabling vsync in KDE, which doesn't make any sense to me.I have no issues watching any other type of video, this seems related to Flash videos only.

I'd like to know if anybody else, with a similar setup, is also experiencing this kind of behaviour.

Re: [SOLVED] Full screen flash video tearing - intel sna acceleration

In Mageia KDE, I have to have vsync turned on to eliminate tearing. For Arch, I am using XFCE with compiz. This is on a ThinkPad X220 with Intel HD3000 graphics.

Tried full screen flash with the default uxa and also with sna. Both run virtually free of tearing on a youtube video that I use for a test (I set the quality to 480p and run fullscreen).http://www.youtube.com/watch?v=OhVlFna5DPQ

Some other info that you can compare to yours.A line from /var/log/Xorg.0.log

EDIT: Just booted Mageia KDE. I see I have desktop effects turned on, using VSync, using OpenGL 2 Shaders, using OpenGL compositing.

EDIT2: Yes, I see that just as you report regarding KDE (Mageia 2 here), I have tearing on viewing flash videos in my browser, but no tearing viewing the same video with VLC. This is not the case using XFCE with compiz (no tearing). Same laptop in both cases.

Re: [SOLVED] Full screen flash video tearing - intel sna acceleration

VSync should be turned on.

Experimenting a little more in Mageia 2 KDE, I find that checking the box: Desktop Effects > Advanced > Suspend desktop effects for fullscreen windows - makes an improvement for full screen flash videos. It's still not quite as smooth as Arch XFCE w/compiz, but it's not bad.

Re: [SOLVED] Full screen flash video tearing - intel sna acceleration

When I try to disable 'OpenGL 2 shaders' I get an error saying that desktop effects can't be started with the configured options and it just reverts to having them enabled. Did this happen to anyone else? (Maybe I have a problematic combo but... what exactly...?)